Countries don't need wars to shoot people. You make laws and issue executive orders, and when they are violated, you send people to hit the violators with sticks until they comply, and if that doesn't work, to shoot them until they stop moving.

Any and all economic policy is ultimately backed by violence. That's what governments are for.

Great Britain actually did this regularly. For hundreds of years they would war all over europe until they ran out of money, make up some scheme to refill the coffers (including eventually inventing the central bank and other shenanigans with the "South Sea" bubble), and then go back to war in europe.

>Do you have reference to a nation state in history that warred their way out of a debt spiral?

See: 600 years of Roman history.

But for a modern example, just look at Bretton-Woods.